The toroidal component of the stellar magnetic field is scaled with
the value for the solar wind measured at \(1\, \rm au\)  [1]}, [2]}.
The Wolf-Rayet stellar properties are as follows. We use
\(\dot{M}^{\rm wr}=10^{-4.3}\, \rm M_{\odot }\, \rm yr^{-1}\) ,
\(v_{\rm w}^{\rm wr}=1900\, \rm km\, \rm s^{-1}\) ,
\(R_{\star }^{\rm wr}=2.3\, \rm R_{\odot }\)  and
\(v_{\rm rot}^{\rm wr}=10\, \rm km\, \rm s^{-1}\) , respectively.
These quantities are the values of the Wolf-Rayet
star WR1 (WN4). Our stellar parameters are summarised in
Table REF .
The stellar surface magnetic field is rather unconstrained, and we
decided to take \(B_{\star }^{\rm wr}=100\, \rm G\) .
Similarly, we assume that the toroidal component of the magnetic field
scales with the magnetic field in the solar
wind [1]}, [2]}.
